Fitting a new consumer can be quite an involved job, where the power needs to be switched off for a few hours and each circuit connected to its relevant protective device. Both before and after powering up, thorough electrical testing is carried out and recorded as an Electrical Installation Certificate (EIC). This is presented to the customer on completion of the job and also submitted to building control. That is why it is imperative the installing of the consumer unit is carried out by a competent electrician who is also a member of a competent person’s scheme e.g. NAPIT (National Association of Professional Inspectors and Testers).